POST UTME JOSEPH AYO BABALOLA UNIVERSITY 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a e\cosystem, the population of a species is limited by the availability of food. What is the term for this type of limitation?
A. Competition
B. Predation
C. Mutualism
D. Resource limitation
Question 2
A diagram of the human nervous system is shown below. What is the function of the part labeled 'B'?
A. To transmit sensory information
B. To regulate body temperature
C. To control voluntary movements
D. To produce hormones
Question 3
In the process of osmoregulation, the kidneys play a crucial role in maintaining the balance of what in the body?
A. Electrolytes
B. pH levels
C. Water balance
D. Blood pressure
Question 4
The human body is composed of various systems, including the circulatory, respiratory, and nervous systems. Which of the following is a function of the circulatory system?
A. Transportation of oxygen and nutrients to cells
B. Removal of waste products from the body
C. Regulation of body temperature
D. Production of hormones
Question 5
The growth and development of an organism is regulated by what system?
A. Nervous system
B. Endocrine system
C. Circulatory system
D. Respiratory system
Question 6
In the xylem, what is the primary function of the tracheids?
A. Transport of water and minerals from roots to leaves
B. Production of ethylene gas for plant growth
C. Storage of starch and other nutrients
D. Regulation of stomatal opening and clo\sing
Question 7
The xylem in plants is responsible for transporting what subs\tance from the roots to the leaves?
A. Water
B. Minerals
C. Sugars
D. Proteins
Question 8
The process of meiosis in a diploid cell results in the production of four haploid daughter cells. What is the primary function of the synaptonemal complex in meiosis?
A. To facilitate the exchange of genetic material between homo\logous chromosomes
B. To ensure the accurate separation of sister chromatids during anaphase I
C. To regulate the progression of meiosis from prophase I to metaphase I
D. To promote the formation of chiasmata between non-sister chromatids
Question 9
In the context of reproductive bio\logy, what is the term for the process by which an organism produces offspring without the involvement of gametes?
A. Asexual reproduction
B. Sexual reproduction
C. Mutation
D. Genetic drift
Question 10
A bio\logist is studying the structure of a prokaryotic cell. What is the primary function of the cell membrane in prokaryotic cells?
A. To regulate the movement of materials in and out of the cell
B. To provide structural support to the cell
C. To facilitate the exchange of gases between the cell and the environment
D. To store nutrients and water within the cell
Question 11
In the process of osmoregulation, what is the primary mechanism by which the kidneys regulate the concentration of ions in the blood?
A. Hormonal regulation
B. Renal tubular reabsorption
C. Glomerular filtration
D. Hemodialysis
Question 12
In a desert e\cosystem, the primary producers are
A. Carnivores
B. Herbivores
C. Decomposers
D. C3 plants
Question 13
The diagram below shows the structure of a plant cell. What is the function of the cell wall?
A. Provides structural support
B. Regulates the movement of materials in and out of the cell
C. Produces energy for the cell
D. Stores genetic information
Question 14
A population of bacteria is growing exponentially. If the initial population size is 100 and the growth rate is 0.2 per hour, what is the population size after 5 hours?
A. 1000
B. 2000
C. 5000
D. 10000
Question 15
A gene is located on the X chromosome. What is the expected effect on the gene's expression if a mutation occurs in the gene?
A. Increased expression
B. Decreased expression
C. No change
D. Variable

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